From 2b821cce1c950cead081d779db0dda680192c4bd Mon Sep 17 00:00:00 2001 From: David Ahern Date: Thu, 18 Jul 2013 17:27:59 -0600 Subject: [PATCH] perf evsel: Handle ENODEV on default cycles event Some systems (e.g., VMs on qemu-0.13 with the default vcpu model) report an unsupported CPU model: Performance Events: unsupported p6 CPU model 2 no PMU driver, software events only. Subsequent invocations of perf fail with: The sys_perf_event_open() syscall returned with 19 (No such device) for event (cycles). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? Add ENODEV to the list of errno's to fallback to cpu-clock. Signed-off-by: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1374190079-28507-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- Reading git-format-patch failed